键控Led灯

ycf

1. #define PIN_LED 16
   
2. #define KEY_FLASH 0
   
3. 
   
4. void setup() {
   
5.   pinMode(PIN_LED, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
   
6.   pinMode(KEY_FLASH, INPUT);
   
7.   digitalWrite(PIN_LED,LOW);//点亮LED灯
   
8. }
   
9. 
   
10. // the loop function runs over and over again forever
    
11. void loop() {
    
12.   /*
    
13.   digitalWrite(BUILTIN_LED, LOW);   // Turn the LED on (Note that LOW is the voltage level
    
14.                                     // but actually the LED is on; this is because
    
15.                                     // it is acive low on the ESP-01)
    
16.   delay(1000);                      // Wait for a second
    
17.   digitalWrite(BUILTIN_LED, HIGH);  // Turn the LED off by making the voltage HIGH
    
18.   delay(2000);                      // Wait for two seconds (to demonstrate the active low LED)
    
19.   */
    
20.   if(digitalRead(KEY_FLASH)==0)
    
21.   digitalWrite(PIN_LED,HIGH);
    
22.   else
    
23.   digitalWrite(PIN_LED,LOW);
    
24.   
    
25. }
    

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